CVE-2020-36326

  • Published Date: Wed 28 Apr 2021
  • Last Modified Date: Fri 07 May 2021

PHPMailer 6.1.8 through 6.4.0 allows object injection through Phar Deserialization via addAttachment with a UNC pathname. NOTE: this is similar to CVE-2018-19296, but arose because 6.1.8 fixed a functionality problem in which UNC pathnames were always considered unreadable by PHPMailer, even in safe contexts. As an unintended side effect, this fix eliminated the code that blocked addAttachment exploitation.

References (Advisories, Solutions, and Tools):



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